Combination blanking and drawing and fluid-expansion dies.



l. L POMEHOY.

COMBINATION BLANKING AND DRAWING AND FLIJID EXPANSION DIES.

APPLICATION FILED JULY I4. I916.

l 1 99,41 4. I Patented Sept. 26, 1916.

3 SHEETS-SHEET I I. L. POMERQY.

COMBlNATlON BLANKING AND DRAWING ANB FLUID EXPANSIUN DIES.

APPLICATION HLEDJULYI4.1S!6. 1,199,414.

3 SHEETSSHEET 2.

Patent-ed Sept. 26, 1916.

Zgfii zsa v IRVING L. POMEROY, OF CHICAGO, ILLINOIS.

COMBINATION BLANKING AND DRAWING AND FLUID-EXPANSION DIES.

Specification of Letters Patent.

Patented Sept. 26, 1916.

Application filed. July 14, 1916. Serial No. 109,238.

To all whom it may concern-.-

Be it known that I, IRVING L. POMEROY, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Combination Blanking andDrawing and. Fluid-ExpansionDies, of which the following is aspecification.

This invention relates to blanking, drawing, and fluid-expansion diesand has for its object ofthe provisionof a die adapted in a single 0oration to blank, draw and expand artic es of sheet metal.

A further object of my invention is the provision of a die in which adrawn metal blank is subjected to the expansive action of fluid pressureto produce therein ornamental or other effects which can not be obtainedby the drawing operation alone.

A still further object of my invention is the provision of a die of thecharacter described, involving a minimum number of simple and relativelyinexpensive parts and adapted to accomplish the desired result in anetlicient and economical manner.

Further objects and advantages of my invention will be apparent as it isbetter understood by reference to the following specification when readin connection with the accompanying drawing, illustrating a pre ferredembodiment thereof, in which- Figure 1 is a side elevation of a machineaccording to my invention; Fig. 2 is a front elevation thereof; Fig. 3is a detail'plan view of a die table with the cooperating punch insection, and Fig. 1 is a vertical section on the line 4-4 of Fig. 3.

Referring to the drawing, 1 indicates an under frame adapted to supportthe bolster 2 and the upper frame 8. A shaft 4: is journaled in suitablebearings in the upper frame 3 and is provided with a pulley and flywheel 5 loosely mounted thereon. A clutch 6 is adapted to connect thepulley and fiy wheel to the shaft 1 and is controlled through the mediumof a rod 7 by a treadle S pivotally mounted on the'frame 1 adjacent thefloor upon which the frame rests. 7 V

The upper frame 3 is provided with guideways 9 in which a slide 10 ismounted. Extensions 10 of the slide 10are provided with Boilers 11coiiperating with a pair ofcams 11 secured to the shaft 4. An innerslide 13 is mounted in the guideways 12 on the slide 10 and is connectedby a member 14 to a crank 15 on the shaft 4. As the shaft 4 rotates,therefore, the slides 10 and 13 are moved vertically independently ofeach other.

A circular table '16 is rotatably mounted on the bolster 2 and isprovided with a plurality of matrix dies 17 in the form of rings, theinner peripheries of the rings having I the desired form of the finishedarticles cut in intaglio therein. A blanking and drawing die 18 issecured to the bolster and positioned above one of the matrix dies 17.The matrix dies 17 are bottomless and a member 19 is provided which isadapted to close the bottoms of one of'the matrix dies 17 as they aresuccessively positioned beneath the slides 10 and 13 and the blankingand drawing die 18. The slide 10 carries a blanking punch 20 and theslide 13 carries the drawing punch 21, the. punches 20 and 21 beingadapted to cooperate with the blanking and drawing die 18 which ispositioned beneath said punches.

The rotatable table 16 is provided on its periphery with a plurality ofnotches 22 corresponding to the number of dies 17 mounted therein. A dog23 is mounted on a slide 24 operating in a groove 25 in the bolsteradjacent the periphery of the table 16 and is adaptedto successivelyengage the notches 22 to rotate the table. A link 26 connects the slide21 to one arm of the bellcrank 27 pivotally mounted at 28 on the.

upper frame 3 and a link 28 connects the other arm of the bell-crank 27to a crank 29 on the shaft 4.

The member 19 is connected at one end of a rocking beam 30 pivotallymounted at 31 in a support 32 depending from the bed 2 and the oppositeend of the rocking beam 30 is connected by a link 33 to one arm of thebell-crank lever 31 pivotally mounted at 35 on the upper frame 3. Theopposite end of the bell-crank lever 31 is provided with a roller 36adapted to cooperate with a cam 37 on the shaft 1. r

The drawing punch 21 is provided with a duct 38 which is enlarged at 39adjacent the end of the punch and closed by a threaded plug 40. A spiralspring 11, resting on the plug 40 supports a ball 12 in position toclose the end of the duct 38 except when fluid is forced thereto underpressure sufiicient to overcome the resiliency of the spring 41. it pipe43 is connected by a flexible coupling 4% to the duct 38 and by l to theinterior of a shape. the metal into the matrix die 17 and against movedto to a pipe 46 leading cylinder 47 mounted on a bracket #:Son the topof the upper frame 3; A cylinder %9 is mounted on the bracket 48 abovethe cylinder 47. The cylinders 47 and 49 are provided with a commonplunger 50 which is connected by ai member 51 to a slide 52 mounted in aguide 53 and slotted at its lower end to embrace the shaft 4. The slide52 is provided with rollers 54: engaging a cam 55 on the shaft 4 and asthe cam rotates the slide 52 and consequently the plunger 50 isreciprocated.

The cylinder 47 is connected by a pipe 56 to a tank 57 adapted tocontain a quantity of liquid, preferably water. A check valve 58 isprovided in the pipe 56 to prevent the return of liquid drawn therefrominto the a flexible coupling cylinder l7 by the action of the plunger50.

The cylinder 49 is connectedby a pipe 59 to the tank 57 and a checkvalve (30 is provided in the pipe 59 to prevent the return of liquidforced from the cylinder 49 by the plunger 50.

A bracket 61 is mounted on the slide 13 and supports an ejector62spacedfrom the slide 13 sufficiently to engage an article in a die 17at one side of the punch 21. A pipe (33 is disposed within the ejector62 and is provided at its 6%. The pipe 63 is connected by a flexiblejoint 65 to a pipe 66 whichis in turn connected by a flexible joint 67to a pipe 68. The pipe 68 is connected to the interior of the cylinder4:9. A bracket 69 supports a roll 70 of sheet metal which may be fed inanysuitable manner through the guides 71 which properly position themetal between the blanking and drawing die 18 and the blanking punch 20.

The operation of my invention will be readily understood from thefollowing brief description thereof. a

The sheet metal being arranged in the guides 71, power is applied to theshaft 4 which causes the slides 10 and 13 to descend. The blanking punch20 first engages the metal. and in cooperation with the blanking anddrawing die 18 cuts therefrom a blank of. the desired size and th'eidrawing punch 21 descending draws the blank into a on The drawing punch21 then forces the member 19 which has meanwhile been position to closethe bottom of the die 17 through the medium of the rocking beam 30 andits connection with the cam 37 on the shaft fl. dWhen this hasbeenaccomplished the rotationrof the cam 55 causes the plunger 50,to movedownwardlytplacing the liquid within the cylinder47- under pressure sothat -16, 43 and the duct 38 to the interior of the lower end with acheck valve it is forced through the pipes Y formed blank, forcing theblank into engagement with the walls of thematrix die 17. The ball 42prevents the escape of liquid from the duct 38 except when pressure isapplied thereto by the plunger 50. Contin ued movement of the shaft 4:liftsthe slides 10 and 13, withdrawing the blanking punch 20, thedrawing punch 21 and the member 19 forming the bottom of the matrix die.17. As soon as the punches have been withdrawn the slide2+l is movedforwardly to rotate the table 16 through the medium of the dog 23. Thetable 16 is rotated in the direction of the arrow on Fig." 3 and thenext suc-v ceeding matrix die 17 is thereby disposed in operativeposition while the matrix die 17 carrying the finished article is movedto a position. above the opel ng 72 1.. the bolster 2. Upon the nextdownward movement of the slides 10 and 13 the ejector 62 is moved intoengagement with the finished article in the die 17 as indicated inFig.4. The pipe 63 moves with the ejector 62 and through this pipe theliquid is withdrawn to the cylinder 49 which has been freed from liquidby the prex'iousupper stroke of the plunger 50, the liquid having passedthrough the valve 60 and pipe 59 to the tank 5?. The finished article isdie 17 by the ejector and the cycle of operations is thereby completed.

From the foregoing it will be readily 1111-. derstood that I haveperfected a simple ap.- paratus adapted to automaticallj blank, draw andexpand sheet metal into articles of more or less irregular shape.

My machine is efiicient and rapid'in operation and is entirelyautomatic, requiring little or no attention from the operator.

Sheet metal articles may be formed in a press thus equipped with greatrapidity and consequent low cost. i

The press I is adapted to form articles adapted to a wide variety ofuses.

It will be readily apparent that various changes may be made in theform,constructionand arrangement of the parts without departing from thespirit or scope of the invention or sacrificing any of its materialadvantages the form hereinbefore described being merely a preferredembodiment thereof.

I claim: v

1. In a machine of the character described, the combination ofsuperposed blanking and drawing and matrix dies, a member intermittentlycooperating with said matrix die to close the bottom thereof, blankingand drawing punches, means for actuating said punches to cooperate withsaid dies, a duct in said drawing punch, and means for forcing liquidunder pressure through said duct to expand a drawn blank into engagementwith the walls of said matrix die.

2. Tn a machine of the character described,

forced from the matrixpunches, means for advancing said table tosuccessively position one of said matrix dies beneath said punches,means for actuating said punches to cooperate with the set of punches,

dies when so positioned, a member movable to close the bottom of thematrix die, a duct in said drawing punch, and means for forcing liquidunder pressure through said duct to expand a drawn blank into engagementwith the walls of said matrix die.

3. In a machine of the character described,

the combination of a table, a plurality of matrix dies embodied-therein,a blanking and drawing die, blanking and drawing punches, means foradvancing said table to,

successively position one of said matrix dies beneath said blanking anddrawing die, means for actuating said punches to cooperate with the setof dies when so positioned, a member movable to close the bottom of thematrix die, a duet in said drawing punch, means for forcing liquid underpressure through said duct to expand a drawn blank into engagement withthe walls of said matrix die, and means for automatically ejecting theexpanded' blank afterthe table has advanced. 1

4. In a machine of the character described, the combination of a table,a plurality of matrix dies embodied therein, a blanking and drawing die,blanking and drawing means for advancing said table to successivelyposition one of saidmatrix dies beneath said punches, means foractuating said punches to cooperate with the -set of dies when sopositioned, a member movable to close the bottom of-the matrix die, aduct in said drawing punch, means for forcing liquid under pressurethrough said duct to expand a drawn blank into engagement with the wallsof said matrix die, means for automatically ejecting the expanded blankafter the table has advanced, and means for withdrawing liquid from theexpanded blank before it is ejected.

5. In a machine of the character described,

the combination of a rotatabletable, a plu-' rality of matrix diesembodied therein, a blanking and drawing -die, blanking and drawingpunches positioned above said blanking and drawing die, means forrotating said table to successively position one of said matrix diesbeneath said punches, means for actuating said punches to cooperatewiththe set of dies when so positione a member movable toclose the bottom ofthe matrix die, a duct in said drawing punch; and means for forcingliquid under pressure drawn blank into engagement with the walls of saidmatrix die.

6. In a machine of the character described,

tioned, a member through said duct to expand a the combination of arotatable table, a plurality of matrix dies embodied therein, a blankingand drawing. die, blanking and drawing punches positioned above saidblanking and drawing die, means for rotating said table to successivelyposition one of said matrix dies beneath said punches, means foractuating said punches to cobperate with the set of dies when sopositioned, a member movable to close the bottom of the matrix die, aduct in said drawing punch, a. cylinder connected to said duct, meansfor supplying liquid to said cylinder, a plunger in said cylinder, andmeans for actuating said plunger to force liquid under pressure throughsaid duct to expand a drawn blank into engagement with the walls of saidmatrix die.

7. In a machine of scribed, the combination of the character dearotatable table,

a plurality of matrix dies embodied therein.

a blanking and drawing die, blanking and drawing punches positionedabove said of said matrix diesbeneath said punches,

means for actuating said punches to cooperate with the set of dies whensoposimovable to close the bottom of the matrix die, a duct in saiddrawing punch,- a cylinder connected to said duct,- means for suppl ingliquid to said cylinder,

a plunger in said cylinder, means for actuating said plunger to forceliquid under pressure through said duct to expand a drawn blank intoengagement with the walls of said matrix die, and means forautomatically ejecting the expanded blank after the table has beenrotated to position the successive matrix die beneath said punches.

8. In a machine of the character described, the combination ofarotatable table, a plurality of matrix dies embodied therein, ablanking and drawing vdie, blanking and drawing punches positioned abovesaid blanking and drawing die, means for rotating said table tosuccessively position one of said matrix dies beneath said punches,-

means for actuating said punches to cooperate "with the set of dies whenso positioned, a member movable to close the, bottom of the matrix die,a duct in said drawing punch, duct, means cylinder, a plunger foractuating said for supplying liquid to said in said cylinder, meansplunger to force liquid into engagement with the walls of said matrixdie, means for automatically ejecting the expanded blank after the tablehas been rotated to position the successive matrix die beneath saidpunches, and means operating with said ejector-to withdraw liquid fromthe expanded blank before it is ejected,

a cylinder connected to said under pressure through said duct to expandI d a drawn blank "with the die,

9. In a machine of the character described, the combination of arotatable table, a plurality of matrix dies embodied therein, a blankingand drawing die, blanking and thawing punches positioned above, saidblanking and drawing die, means for, rotating'said table to successivelyposition one of saulm'atrix dies beneath said punches, means foractuating said punches to cooperate with the set of dies when.sopositioned, a member vmovable toclose the bottom of the matrix die,aflduct in said drawing punch, a pair of opposed cylinders, one ofwhich-is connected to said cylinders, means for supplying liquid to thecylinder connected. to said duct, means for actuating said plunger toforce liquid under pressure through said duct to expand a drawn blankinto engagement with the Walls of said matrix die and to simultaneouslyneath said punch,'a member for closing the bottom of a matrix dieivhenso positioned, means for actuating said punch to cooperate a duct insaid punch, and means for forcing liquid under pressure through saidduct to expand a drawn blank Copies of this patent may be obtained forfive cents each, by addressing the J a I Washington, 13.9." a

duct, a plunger in said.

In a machine of the character dc the combination of i a rotatable intoengagement with the Walls of said matrix die.

11. In a machine of the character described, the combination of arotatable table, a plurality of matrix dies mounted thereon, a punch,means for rotating said table to successively position said dies beneathsaid punch, amember for closing the bottom of amatrix die when sopositioned, means for actuating said punch-to cooperate with the die, a"duct in said punch, means i" or forcing liquid under "pressure throughsaid duct to expand a drawn blank into engagement with the walls of saidmatrixdie, and means for automatically ejecting the expanded blank afterthe table has been rotated to position the next succeeding matrix 'diebeneath said punch.

12. In a machine of the character de scribed, the combination of. arotatable table, a plurality of matrix dies mounted thereon, a punch,means for rotating said table to successively position said'dies beneathsaid punch, a member for closing the bottom of a matrix die when sopositioned, means for actuating said punch to'cooperate with the die, aduct in said punch, means for forcing liquid under pressure through saidduct to expand a drawn blank into-engagement with thewalls of saidmatrix die, means for automatically ejecting the expanded blank afterthe table has; been rotated to position the next succeeding die beneathsaid punch, and means for Withdrawing liquid from the ex panded blankbefore it is ejected;

IRVING L. POMERO Y, Witness:

M. A. Kmnm.

Commissioner of Patentl,

